He says he was threatened with being reported to the police for “illegally” filling three ordinary five-liter jerry cans after he also sat fuel in his 42-year-old ex-Army Land Rover Gloria.
Mr Cupis, 54, said: “I went to Tesco Extra gas station to refuel in my Land Rover and to refill the three cans for my old classic motorcycles and my lawn mower.
“I was busy filling the cans when the prepaid pump was switched off and a woman came out of the kiosk and told me to report to the police.
“She came across the courtyard and shouted ‘stop it’ to me in front of other customers. The courtyard was crowded and it was quite embarrassing.
“She told me that they had CCTV and that they intended to report me to the police for breaking the law and that I was only allowed to fill two containers.
“When I got home, I did a quick research and discovered that there is no law on how many containers you can fill.”
Is there a limit to how many fuel cans you can use at gas stations?
He said he was told that “a maximum of two containers” for the transport of fuel is allowed by law during the transport of dangerous goods and the provisions of the European agreement.
But Mr Cupis said he thought it was wrong.
“Why do they threaten to report people to the police with a law that does not exist?” he said.
A Tesco A spokesman said: “In accordance with the Petroleum Consolidation Regulations, we must have a policy in place to ensure the safe use of portable fuel tanks at our gas stations.
“Our policy is that only two portable containers (with a maximum total capacity of 30 liters) may be filled at each visit by a customer.”